| Teams | 8 | ||
|---|---|---|---|
| Champions |  Newcestown (2nd title) | ||
| Runners-up |  Castlemartyr | ||
| |||
The 1990 Cork Junior A Football Championship was the 92nd staging of the Cork Junior A Football Championship since its establishment by Cork County Board in 1895.
The final was played on 2 December 1990 at the Ballinhassig Grounds, between Newcestown and Castlemartyr, in what was their first ever meeting in the final.[1] Newcestown won the match by 0–12 to 0–05 to claim their second championship title overall and a first title in 23 years.[2][3][4]
- ^ "Junior AFC". Cork GAA website. Retrieved 28 November 2021.
- ^ "Club history". Newcestown GAA website. Retrieved 28 November 2021.
- ^ "Club Titles - Cork". Hogan Stand. Retrieved 28 November 2022.
- ^ "Newcestown celebrating golden jubilee of first county final win". The Southern Star. 21 November 2017. Retrieved 28 November 2021.